Most of the major media resources used are free and/or Creative Commons. Here are the credits:
The star of the show: guardian statue by drondron1986 (no longer there, but here’s a SketchFab link)
Robot Dummy from triduza
Title music by Setuniman
Sound effects by hykenfreak
Miscellaneous sound effects
Skybox Volume 2 from the Hedgehog Team
Sentry model from Hand Painted Forest Light by Red Panda
Tree and rock models (no longer available) by Tornado Bandits
VR Keyboard by YUNAN